Detection of quantum states of single electrons on liquid helium

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K15118
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 28020:Nanostructural physics-related
• Research Institution: Okinawa Institute of Science and Technology Graduate University
• Principal Investigator: Elarabi Asem 沖縄科学技術大学院大学, エンジニアリングセクション, 電子機器研究支援チームリーダー (70866748)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: Cryogenic amplifer / Electrons on Helium / Qubits readout / Cryogenic electronics

Outline of Final Research Achievements

Our project successfully developed a two-stage cryogenic amplification scheme, significantly enhancing the sensitivity and bandwidth of quantum state detection for electrons on liquid helium. This method achieved a constant gain of 40 dB over a frequency range of 100 kHz to 100 MHz, enabling the accurate detection of Rydberg states.
This advancement addresses critical challenges in quantum computing, paving the way for more efficient and densely packed qubit arrays. Additionally, the improved detection methods have broader applications in fields requiring high-sensitivity measurements at low temperatures, such as astrophysics and material science. The project's findings contribute significantly to the development of scalable quantum computers and other advanced technologies.

Free Research Field

cryogenic and superconducting electronics

Academic Significance and Societal Importance of the Research Achievements

This research enhances quantum states detection, crucial for scalable quantum computing, addressing major scientific challenges. It also benefits fields requiring high-sensitivity low-temperature measurements, such as astrophysics and materials science, driving scientific and technological progress.